Please Help!! A circle has a radius of 20 centimeters. What is the area of a sector of the circle spanned by a central angle of 45 degrees?

Louis wants to carpet the rectangular floor of his basement. the basement has an area of 864 square feet. the width of the basement is 2/3 it's length. what is the length of louis's basement

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap

Solve for the equation. 4x - 13 = 2x + 9